The studies about the deleterious effects of sitting make me wonder if this is strictly related to the sitting posture, or is it the inactivity that’s the culprit? The New York Times responds.

The problem is that we don’t use our legs when we sit or lie prone. Our legs and backside contain some of the largest muscles in our body, which contract robustly when we are upright. In the process, they use blood sugar to fuel themselves and stimulate the release of biochemicals that favorably affect cholesterol levels and other metabolic processes.